Olympia Water Systems OROS-50 Review


A fairly good product at a decent price – this Olypmia Reverse Osmosis system will get the job done. And you shouldn’t have doubts regarding its performance – it is no worse than similar reverse osmosis systems in the same class.


Designed and manufactured in the USA, the system is NSF certified and has a membrane with a capacity of 50 gallons per day. It is a 5-stage filtration system so the quality and taste of your drinking water are not under discussion. The system is designed to fit under standard sinks, so it is good both for your home and business.


Olympia Water Systems OROS-50 5-Stage Reverse Osmosis Water Filtration SystemAs a 5-stage RO, this product not only removes the unhealthy contaminants such as chlorine and total dissolved solids but is also very efficient with bacteria, viruses, protozoa, and amoeba in water. You might, though, want to add a UV light filter if you are more sensitive to the composition of your water.

At the first stage, you have a 5-micron sediment filter, followed by 2 carbon block filters, RO membrane on the 4th stage and post-carbon filter at phase 5. The tank of the system is made of stainless steel.

The ratio of drain water vs. drinking water is 4:1 which is absolutely acceptable for the class. The recommended feed water temperature is 50-100 F (5-38 C). The recommended operating pressure is 50 psi-100 psi. If yours is lower you then might need a pump.  Now, don’t expect your PPT to fall down to zero. But you will have neutral pH water with a nice taste.


The product comes with 3 filter housings, a flow restrictor, automatic shut-off valve, sediment filter, 2 carbon block filters, 50GPD RO membrane, post-carbon filter, and 3.2-gallon tank. It also has a tank ball valve, 3/8” feedwater angle valve, and a drain saddle valve.

The 4 tubes are 1/4″. You are supplied with a chrome-finish faucet, housing wrenches, and Teflon tape. The faucet mounting range is 1/2″ – 1 1/2″ for a sink or countertop.

Installation and maintenance

Installation is easy and very little experience is required. If you have some, you will have no difficulties. If you don’t – be sure to read the instructions carefully. The manufacturer has included a step-by-step guide with color photographs for your convenience. That’s not all, the tubing is colored too.

You will most probably need to drill a small hole in the sink drain. Pay attention to this as it is easy to get the hole out of alignment. In any case, you will receive superb and well-acquainted tech support over the phone if you have issues. Drilling holes in a stainless steel sink can be a tricky endeavor.

Filter 1 to 3 should be changed between 6 and 12 months. The membrane should last 2 to 3 years and the coconut post-carbon filter is supposed to last 12 to 24 months. Keep in mind that these numbers depend very much on the main qualities of the water, its temperature, etc. So in general, a pretty decent system to maintain.


  • Affordable price, great performance
  • 5-stage system for high-quality water with good taste
  • NSF certified
  • Easy to install and maintain
  • Reasonable waste


  • You will need to drill a hole
  • Might take all the under kitchen space
  • Leaks are sometimes possible, but the tech support is great

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